The format of the competition will consist of five shows: three semi-final rounds, a second chance round and a final. An initial 21 entries will be selected for the competition through one method : an open call for song submissions. The 21 competing entries will be divided into three semi-finals, with seven compositions in each. From each semi-final, the songs that earn first and second place qualify directly to the final, while the songs that place third and fourth proceed to the Second Chance round. The bottom three songs in each semi-final will be eliminated from the competition. An additional three entries will qualify from the Second Chance round to the final, bringing the total number of competing entries in the final to 9. All six shows will be hosted by Agnese Rakovska and Edgars Viļums.

The winning song will compete for Latvia at the The Origin Song Contest to be held in TBD.

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Supernova 2, organised by Latvijas Televīzija (LTV), will be 1st edition of the contest in which the competition will take place in different cities across Latvia. The three semi-finals will be held at the Ventspils Olympic Center in Ventspils. The Second Chance round will take place at the Lielais Dzintars in Liepāja while the final will be held at the Arēna Rīga in Riga. 21 entries will compete in the semi-finals, with seven entries taking part in each show. The top two entries from each semi-final advance directly to the final, while the third and fourth placed entries advance to the Second Chance round. The bottom three entries in each semi-final will be eliminated. An additional four entries will qualify to the final from the Second Chance round, bringing the total number of competing entries in the final to 9.

18 entries will be chosen by a selection panel from submissions received by LTV through an open call for songs.

3 entries will be chosen by a selection panel from submissions received by Latvijas Radio 5 through an open call for songs.

LTV opened two submission contests that accepted entries between 1 and 10 February 2017 for interested artists and songwriters to submit their proposals for the competition. Entries submitted for the competition were required to be realesed after 2013 and with singer/band that holds Latvian citizenship. The choice of language was free.

Following the conclusion of the submission periods, LTV received 47 entries. LTV will create a shortlist of entries from the received submissions and will form a selection panel that will be tasked to select 18 entries for the competition.